| Object : | Constellation Draco |
| Coordinates/Direction : | RA: 17h--m, DEC: +65o--' |
| Object size : | 76 stars |
| Object magnitude : | - |
| More to know : |
Constellation Draco, Wikipedia:
https://en.wikipedia.org/ wiki/ Draco
|
| Date : | 2024-03-07 |
| Comment : |
Sometimes it's difficult to get ideas of what objects to take photography on.
This time I chose to take photos of the stars in the constellation Draco and investigate what objects there are in its surroundings.
The red rectangle is the field of my photography equipment, a 300 mm lens with a full frame camera.
It's centered on each stars with a circle. |
| Exp. time : | 59x60 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, no darks, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature +3o C |
| Comment : |
The star Phi Draconis in center.
It's a 4.22 magnitude stars with a small variation with a period of 1.7 days.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry:
Phi Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Most of them are galaxies.
|
| Exp. time : | 60x60 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, no darks, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature +3o C |
| Comment : |
Eta Draconis, a 2.73 magnitude star.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry:
Eta Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Most of them are galaxies.
|
| Exp. time : | 59x60 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, no darks, synthetic bias, photometric color calibration, desaturate stars |
| Weather : | clear sky, temperature +3o C |
| Comment : |
Theta Draconis, a 4.01 magnitude star.
It's a binary star at a 68 light years distance.
This time I used the function "Desaturate Stars", it's used to restore the stars original shape before saturated.
I'm not sure if I can say they look better, from a diffuse pink center to a smaller strong red dot.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry: Theta Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Most of them are galaxies.
|
| Exp. time : | 60x30 seconds + 60x60 seconds = 90 minutes, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature -2o C |
| Comment : |
Iota Draconis, a 3.3 magnitude star.
In 2002 they found a planet orbiting it. I have split the exposure in two sets, one of 30 seconds and the other at 60 seconds. Maybe this handle the strong stars better than using the Desaturate function.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry: Iota Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Most of them are galaxies.
|
| Exp. time : | 60x60 seconds = 59 minutes, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature -2o C |
| Comment : |
Zeta Draconis, a 3.2 magnitude star.
It's a binary star at a 330 light years distance.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry: Zeta Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Most of them are galaxies, Dra objects are stars.
|
| Exp. time : | 47x60 seconds = 47 minutes, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature -4o C |
| Comment : |
Delta Draconis, a 3.1 magnitude star. It's a yellow bright star t a 97 light years distance.
There are many more objects in the full field image.
Look here at the plate solved image by Astrometry:
Delta Draconis plate solved.
It opens in a new window.
Here are some of the deep sky objects you will find:
Only one deep sky object around this star.
|
English
Credit: CdC / Skychart
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